MICROFICHE REFERENCE LIBFUUW - Cd3wd.com

5the conversion of rotary motion into reciprocal motion. In addition, heinvestigated and suggested the use of centrifugal force to lift water,although it was not to be seriously considered for another 200 years(Tokaty, 1971).In 1511, record is made in Germany of the use of bellows(the samedesign as fire bellows) to lift water. Another new method of liftingwater, the ejector, was invented by Vitrio and Philehert de Lorme in1570 (Kneass, 1903).In 1557, Captain Ramelli, an Italian engineer, developed a rotarypump of four spring-loaded vanes in an eccentric cylinder. Some considerthis to be the first centrifugal pump, however the action is purely positivedisplacement.In the early 17th century, the first gear rotary pump was inventedby Grollierde Serviere. Galiler also worked during the 17th century toexplain, among other things, the inability of a vacuum to lift more than"18 cubits" of water and extended the concept of atmospheric pressure(R&se and Ince, 1963).The 17th century also marked the beginning of rotodynamic pumps. In1680 Johann Jordan designed a centrifugal pump, primarily out of curiosityalthough it was not built until 1703. Denys Papin, in 1689, also builta centrifugal to drain some property of a friend. However, these woodenpumps were crude and due to the lack of a uniform, high speed driver, werelow in efficiency. The development of centrifugals was also suppressedby the popularity of piston pumps. Even in his 1841 Hydraulics, Ewbankstates that "in a hundred years, the present day pump (reciprocating piston)would predominate over all other."